IntelliJ IDEA 2017.1 Help

Changelist

A changelist is a set of changes in files that represents a logical change in source code. The changes specified in a changelist are not stored in the repository until committed (pushed).

Any changes made to the source files, are automatically included in the active changelist. Initially, the Default changelist is active, but you can make any other changelist active. The active changelist is displayed on top of the Version Control tool window, with the name being highlighted in bold font.

In addition to the Default changelist, you can create new changelists, delete existing ones (except for the Default changelist), and move files between changelists.